Abstract: Construction is a sector that accepts innovations slowly. Selection of effective technological systems in construction is a complex multi-criteria task. Many decision-makers refuse innovations once faced with similar difficulties. The article presents an original approach towards a development of multi-criteria assessment and ranking technique for alternatives of technology in construction. The problem was solved using different well-known MCDM methods ELECTRE IV and MULTIMOORA. Three hybrid methods SWARA-TOPSIS, SWARA-ELECTRE III, SWARA-VIKOR were used to solve the same problem. Priority of considered alternatives was determined based on the average of alternatives performance rank. The article presents a practical case study on evaluation of different alternatives for public buildings refurbishment using typical and novel thermal insulation technologies for facades. Research results demonstrate that novel facades thermal insulation alternatives for facades have a higher performance level than commonly used ones.

Market participants avoid investing in novel and advanced technologies as usually such decisions are associated with staff training, higher initial costs and uncertainty regarding the possible benefits. For this reason, complex model for the assessment of technological solutions should be developed to facilitate the generation and development of commercially viable products. Technology selection is a complex and intricate problem. A decision-maker is not always able to adequately assess conflicting criteria and find the most preferable solution [1, 2]. A multi-criteria model and different techniques provide means to resolve the problem as follows:

selection and analysis of alternatives related to the objective;

selection and analysis of criteria that describe the alternatives;

selection of the most important criteria;

setting weights for each criterion (significance or priority);

gathering of criteria values;

testing of criteria values;

application of multi-criteria methods;

selection of the preferred (optimal) alternative.

The model could be applied for ranking and assessment of technologies as well as evaluation of products, processes and innovative solutions. Refurbishment and renovation of buildings is a world-wide problem of crucial importance. In this article, performance of the model is investigated by solving the renovation problem: undertaking a comparative assessment of alternatives of typical and novel facade insulation technologies for refurbishment of public buildings. Potentially, the market for new high efficient technologies in the insulation sector is unlimited. Even when taking into account the diversity of insulation needs across Europe (depending, for instance, on climate specificities), all individual homes, buildings and industries could be the target of these technologies [3]. However, innovative technologies represent a small share of the total turnover of the insulation market in the European Union (around 5%). With policy makers and civil society increasingly focusing on energy efficiency and the environmental impact of construction products, more innovative products are entering the market [4], [5]. With energy efficiency being a European flagship action in the EU 2020 strategy, awareness among producers and end users should rise, and drive the market to further take into account the environmental-related performance of the products [6]. Most of the electricity, which is generated in Europe, is consumed in buildings. Residential buildings consume about 2/3 of energy per whole building sector [7], [8]. Old apartment buildings use the largest share of energy in post-Soviet countries. This situation was caused by Soviet construction norms. Nowadays, these buildings do not meet the requirements of modern world development and construction norms. These buildings should to be retrofitted (renovated). Research findings and examples of implemented projects show the existence of a huge energy efficiency potential in post-Soviet buildings. Assessment of thermal insulation technologies for buildings is a MCDM problem. Such point of view to the problem supports the development of innovative technological solutions that comply with needs and requirements of the market and enable their effective industrial implementation.

Technology selection is a complex MCDM problem. The process includes different criteria, determination of criteria weights and most importantly to choose the right technique. Zavadskas and Turskis [9] stated that the major criticism issued in the address of MCDM methods is related to the different techniques. Sometimes, different results are obtained when applied to the same problem.